/**
 * Copyright (C) 2013 DaiKit.com - daikit4gxt module (admin@daikit.com)
 *
 *         Project home : http://code.daikit.com/daikit4gxt
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.daikit.daikit4gxt.client.ui.editor.field;

import java.util.Collection;
import java.util.HashSet;
import java.util.Set;

import com.daikit.commons.shared.utils.DkStringUtils;
import com.sencha.gxt.widget.core.client.form.FileUploadField;


/**
 * File upload field extending {@link FileUploadField} with added functionalities
 * 
 * @author tcaselli
 * @version $Revision$ Last modifier: $Author$ Last commit: $Date$
 */
public class DkFileUploadField extends FileUploadField
{

	private final Set<String> acceptedMimeTypes = new HashSet<String>();
	private boolean multiple;
	private boolean initialized = false;

	/**
	 * Constructor
	 */
	public DkFileUploadField()
	{
		initialized = true;
	}

	//
	//	public native void getFiles(InputElement inputElement) /*-{
	//																			 var files = inputElement.files;
	//																			 for (var i =0; i < files.length; i++){
	//																			    var file = f[i];
	//																			    document.body.appendChild(new_div);   
	//																			 }
	//																			 }-*/;

	/**
	 * The field will accept only given mime types
	 * 
	 * @param mimeTypes
	 *           a {@link Collection} of Mime types
	 */
	public void setAccept(final Collection<String> mimeTypes)
	{
		acceptedMimeTypes.clear();
		acceptedMimeTypes.addAll(mimeTypes);
		applyAccept();
	}

	private void applyAccept()
	{
		getFileInput().setAccept(DkStringUtils.collectionToString(acceptedMimeTypes, ","));
	}

	/**
	 * @param multiple
	 *           true to accept multiple files
	 */
	public void setMultiple(final boolean multiple)
	{
		this.multiple = multiple;
		applyMultiple();
	}

	private void applyMultiple()
	{
		if (multiple)
		{
			getFileInput().setAttribute("multiple", "");
		}
		else
		{
			getFileInput().removeAttribute("multiple");
		}
	}

	@Override
	protected void createFileInput()
	{
		super.createFileInput();
		if (initialized)
		{
			applyAccept();
			applyMultiple();
		}
	}
}
